Watchman s time recordeb



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No. l166,166. APatented Deo. 29, 1891.

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T. HAHN. WAT'GHMANS TIME RECORDER.

No. 466,166. Patented Deo. 29, 1891.

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UNITED STATES PATENT OEEICE.

THEODOR HAHN, OF STUTTGART, GERMANY.

WATCHMANS TIME-RECORDER.

SPECIFICATION forming part of Letters Patent No. 466,166, dated December 29, 1891.

Application filed J'nne ll, 1891. Serial No. 395,927. (No model.) Patented in England November 2, 1889, No. 15,438.

T ctZZ whom, it may concern:

Be it known that I, THEODOR HAHN, a citizen of the United States, residing at Stutt gart, in the Kingdom of Viirtemberg and German Empire, have invented new and useful Improvements in Watchmens Time-De# tectors, (which have been patented in Great Britain by Patent No. 15,438, dated November 2, 1889,) of which the following is a specification.

This invention relates to watchmens timedetectors and analogous recording or checking apparatus, and more particularly to those in which a circular dial moved by clockwork, receives periodical impressions from a set of types operated by keys which are located at different stations, (or by a single stationary key,) while th'e box containing the clock and dial is carried from place to place by the watchman or other person whose movements are to be recorded by the instrument.

The object of myinvention is to provide novel means to prevent the clock or timepiece from being stopped by a continued pressure of the type on the traveling dial.

To accomplish this object my invention consists in the features of construction and the combination or arrangement of devices hereinafter described and claimed, reference being made to the accompanying drawings, in which-f' Figure 1 is a face View of a watchmans time-detector after it has been opened, the diaIbeing partly broken or torn away. Fig. 2 is a section along Fig. 1, the instrument being closed. Fig. 3 is aface view of Fig. 1, the case being partly broken away. Fig. et is .a section along y y, Fig. 2. Fig. 5 is a section along e' z, Fig. e. Fig. 6 is a detached View of a dial. Fig. 7 is an under side View of the arm that carries the printing-type. Fig. 8 is a broken plan View on an enlarged scale. Fig. 9 is a View similar to Fig. 2 on a larger scale. the line y', Fig. 1,011 an enlarged scale. Fig. 11 is a section on the line x, Fig. 1, on an enlarged scale.

The dial h, represented by Fig. 6 andl belonging to the instrument illustrated in Figs. 1, 2, and 3, is turned by clock-Work, as usual, and divided by radial lines representing the hours from 1 to 12, and by intermediate lines Fig. 10 isa section taken on representing minutes or fractions ot' hours. The impressions on the dial are made by means of a series of tumblers l 2 3 a 5 6 7 8 9 10 11 l2, operated'by suitable keys; but instead of using type engraved on the face of each tumbler, as usual, and thus producing an impression on the under side of the dial every time the tumbler is lifted, I make the upper ends of the tumblers smooth and form the types on the under side of an arm or counter-plate A, screwed to the inner clockframe and projecting radially over the dial. This counter-plate is partly broken away in Fig. 1 in order to show the tumblers and the radial slot in the base-plate through which the tumblers project. The holes ct a a are for the screws which secure the counter-plate to the clock-frame.

The tumblers are mounted on pivot Z and are lifted without spring action by turning the key inserted through key-hole n, so that said key acts on the shoulders m on the tumblers to lift the latter. Every time a tumbler is lifted it presses the dial against the corresponding type on the counter-plate, thus producing a distinctive mark on the upper face of the dial.

In order to show whether the instrument has been opened since the last examination by the controlling official or the proprietor, I provide the clock-frame with a puncturinglever b and the lid with a trigger c, which lifts the rear arm of the said lever, so as to depress the sharp front end and to perforate the dial whenever the lid is opened. After the point of lever b has perforated the dial it enters into perforation cl in the dial-support-ing plate B. The fulcrum of lever bis held by a bracket e, and f is a spring which presses on the rear arm of the lever so as to disengage the point from the dial when the trigger c is no longer in contact with the said rear arm.

The arrangementof the type on the arm A above the dial is of considerable advantage, in that the impressions produced by the arm and tumblers can be read from the face of the dial, and consequently it is not necessary to lift the dial or bend it over, as would be the case if the impressions were on the under side of such dial.

In some of the instruments hitherto used it was possible to arrest the clock by keeping` the key inserted and thus gripping,` the paper between the die and the counter-plate. To prevent this a spring k is inserted between the paper dial and the clock-work. The dial is ixed by two pins g (j, projecting from a plate t', which is situated underneath the slotted disk G. The latter is fixed to the spindle o, to which the hour-hand would be attached in an ordinary clock. The plate t', which carries the pins g, is connected by the spiral spring 7a tothe plate G. Said pins g project through slots g g in disk G. As long,` as the dial is free to move the pins g will always remain at one extremity of the slots, as seen in Fig. l; but if the dial is stopped the pins g will remain stationary, while the clocl spin dle and the disk G continues to turn. The spiral spring, however, will be coiled up or put under tension, and the pins g will gradually approach the opposite ends of the slots g until the dial is released and the pins g allowed to resume their former position in the slots `by the uncoiling of the spring.

What I claim as new, and desire to secure by Letters Patent, is-

l. In a watchmans time-detector or analogous recording apparatus, the combination of the clock mechanism with a driving-plate moving a pair of pins made to project from the driving-plate, a spiral spring, made to connect the driving-plate with the clock mechanism, and a disk fixed to the clock-arbor above the said driving-plate and provided with a pair of slots through which said pins project, substantially as described.

2. In a watchmans time-detector or analogous recording apparatus, the combination of the clock mechanism with a driving-plate, a pair of pins made to project from the driving-plate, a spiral spring` made to connect the driving-plate with the clock mechanism, and a disk fixed to the clock-arbor above the said driving-plate and provided with a pair of slots through which said pins project, said disk being made to serve as a connection between the spring and the clock mechanism, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witncssscs.

THEO. HAHN.

Vitnesses:

OTTO DETTLING, ADoLF MLLER. 

